An angelic warrior, tasked with eliminating his kind from the earth, must choose love or duty when he fights against a legion of renegades led by the undisclosed mother of his beloved son.

When his best friend refuses to bow to Mankind and leads the second war in heaven against God, a warrior angel must decide between duty and love, between eradicate his rebellious brothers from the earth realm and letting them commit genocide against humanity including the child he and his friend were both originally tasked to protect.

Like DPG said, the concept of Angels being able to procreate is so way off the usual biblical representation of angels that you'll need a lot of explaining.
It reminds me of the movie "Prophecy" with Eric Stolz, Christopher Walken and Virgo Mortensen. The sequel were appallingly bad, but I have fond memory of the original.

What Nir said.

And it's news to me that angels are sexual. Hasn't the traditional representation been that they are created beings, not procreating beings? If your angels are in the business of begetting, I suggest you may need to include an exposition beat clarifying that point somewhere in the setup of your story.

Thank you! This is incredibly helpful and has moved me back to my beat sheet and reworking some major holes I was running into ...